<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo_animal.png" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button></el-header
    >
    <el-container>
      <!-- 页面右侧区域 -->
      <el-aside :width="isCollapse ? '64px' :'200px'">
        <!-- 折叠块 -->
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏导航 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id + ''"
            v-for="item in menuList"
            :key="item.id"
          >
            <!-- 一级菜单模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsList[item.id]"></i>
              <!-- 文本 -->
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavPath('/' + subItem.path)"
              ><template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{ subItem.authName }}</span>
              </template></el-menu-item
            >
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 页面主主体区域 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  name: "Home",
  data() {
    return {
      //左侧菜单数据
      menuList: [],
      //一级菜单图标
      iconsList:{
        '125':'iconfont icon-myfill',
        '103':'iconfont icon-lock',
        '101':'iconfont icon-goods',
        '102':'iconfont icon-roundcheck',
        '145':'iconfont icon-add'
      },
      //是否折叠
      isCollapse:false,
      //当前激活的菜单项
      activePath:'',
    };
  },
  methods: {
    logout() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    //获取左侧菜单数据
    async getMenuList() {
      const { data: res } = await this.$http.get("menus");
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      this.menuList = res.data;
    },
    //折叠菜单列表
    toggleCollapse(){
      this.isCollapse = !this.isCollapse;
    },
  //保存当前点击菜单项的路径 
    saveNavPath(activePath){
      window.sessionStorage.setItem('activePath',activePath);
      this.activePath = activePath;
    }
  },

  created() {
    this.getMenuList();
    this.activePath = window.sessionStorage.getItem('activePath');
  },
};
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #fff;
  padding-left: 0;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    > img {
      width: 50px;
      height: 50px;
      padding-right: 10px;
    }
  }
}

.el-aside {
  background-color: #333744;
  .el-menu{
    border-right: none;
  }
}

.el-main {
  background-color: #eaedf1;
}

.iconfont{
  margin-right: 10px;
}

.toggle-button{
  background-color: #4a5064;
  color: #fff;
  text-align: center;
  font-size: 10px;
  line-height: 24px;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>